Electrical connection



Feb. 925. 1,526,265

E. BERGMAN ELECTRICAL CONNECTIO N FiledY June 14, 1922 f6 l f4 'Patented `Feb. 10, 1925.

vvmuren stares l EDWARD BERGMAN, F NEW YlRi/K, N. Y.,

' C0. INC., F NEW" YORK, N. Y., A CORPGRATON UF NEW? YUM.

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Application filed J une 14,

yTo all whom t may concern.'

Be it known that I, EDWARD Beltonen, a citizen of the United States, and resident -ot New York, in the county'of New York screws, or' nuts, thus obviating the necessity of using a screw driver, pliers or similar tools. -U

,A further obgect 1s to provide a device of this'character with cam ineans which will engage'with and exert a grippingefl'ectv upon the terminals of the .lead wires and to so construct the cam means that an increase in the tension placed upon the lead wires tending to pull the" wires from the connection will cause a correspondingly Vincreased gripping eect upon the wires.

Another object is`to `produce in aV device of this character gripping cams and spring means cooperating therewith, 4said cam and spring means adapted to act as conductors through which the velectrichcurrent passes in fits passage through the connection.

Anotherobject is to provide in a device'ot vthis character means for instantly .releasing the gripping etiect of the cams upon the ieiid wires, and i further object is te incorporate'in said v:releasing means, a means tor anchoring the lead wires to prevent a direct pull being placed upon thev connecting terminals of the wires.

For the accomplishment of these and such further objects as will hereinafter be apparent to those skilled in the art to which this appertains, the invention consists in the construction, combination. yand arrangement of parts herein specifically described and .illusrated in the accompanying drawings,

.f wherein is shown a preferred embodiment of the invention, but it is to be understood that changes, variations and' 'modifications may be resorted to which fall within the 4scope of the claims hereunto appended. ,3

ASSIG-NR T0 THE SATURN Mlml.

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lin the drawings torminga porticrroii this speciication-n Fig. l is a plan view of a section ezt a connection in the vtorni of a telephone jack plug embodying my invention, the cam y members-being shown in their operative or gripping postion.

Fig, 2 is a view similar to lFig. l. with the cams in disengaged or inoperative position.

Fig. 3 is a section on the line 3--3 oit Fig. l and ldig. iis a section on the line iw-d ot Fig. l.

In the drawingsrin which my invention is shown as applied to a telephone jaclr plug, the bodyportion ott-he plug consists oit a block of any suitable insulating material comprised of the two sections l0 and il. The sections are preferably molded into the desired shape land, are provided with the cooperaing step ed recessed portions i2 in which its adapte to be snugly but slidably received the terminal pieces 13 which are secured Ito the ends of the lead wires ld in any suitable manner. u

Secured .in the bloclr section l0, onN the outer siie of and immediately adjacent each of the iP'ner smaller portions of the recesses l2 is aibacking pin 15 preferably ot hardened steel while in transverse alignment with the pins 15 isa pair of pins .iti each of titi which is spaced a short distance inwardly.

from the recesses.

Pivotally mounted upon each of the pins 16 is ya cam lever 17 havingv a plurality of teeth or serrations 18 formed upon the side facing the'adjacent recess and which se 'rations are adapted to Contact with an en- 1 gage the inner reduced portion of the terminal piece 13. The cam levers l? are pro-- vided with thevarms 19 and 20, the arms 1.9 being Ainclined inwardly towards the center of the block so as to lie in the path or a cam releaser 2l, of any suitable insulating .material which is slidably mounted within a guide way 22 formed by cooperating grooves provided in each ot the block sections 10 and 11. The block section Al0 is provided with a rib or stop 28 which is adapted to project'into a., longitudinal slot 2% intermediatethe ends ot the cam releaser 2l,.and which serves as a stop to limit the longitudinal motion of the cam release-r. 'llhe outer end 'of the cam releaser is provided with an aperture 25 to which the usual' strain cord is secured to prevent a direct pull being placed upon the lead wire terminels, while the inner end ot the cam releaser terminates in the reduced rounded end 2o suitable aperture in the end of the insulating block and consists ot an outer metallic sleeve 27, an inner metallic rod Q8 terminating in the ball shaped end 29, said sleeve and rod being sepa/rated by the insulating sleeve 30. The sleeve 2T is slightly reduced in diameter to provide a shoulder 31 and the end of the rod 27 is threaded to receive the nut 32 by means of which the plug is secured to the insulating block. A flat spring 33 is provided with an annular portion 34 which is placed over the rod and contacts with the end ot the metallic .sleeve 30, the annular portion merging into a spring contact arm 35 which engages under tension With the arm 20 of one ot the cam levers 17 and normally toi-ces said arm 2t) outwardly to urge the serrations 1S into engagement with the terminal piece 13. A similar spring 36 is placed upon the rod 28, an insulating Washer 3T be ng placed between the springsI` and both springs and washer are held secui-ely in position by the nut 32. The eontact arni 3S ol the spring l5 contacts with the end 20 ot the other cam lever in the same manner as the contact arm The pins 15 project sutliciently from the block section 10 to serve as dowels 'for locating the section 11 in proper alignment While any suitable means such as a headed screw 39 is used to secure the block sections together,

The operation of the device is as follows. Assuming that the terminal pieces 13 of the lead Wires 14- are to be connected to the jack plug it is only necessary to insert them into the recesses, the reduced ends ot the terminal pieces rotating the cam levers against the pressure of the spring arms, 35 and 8.3 and permitting the termina picccs to be pushed home to the position shown in Fig. 1. lt it is desired to remove the terminal pieces the cam releaser Q1 is pushed inwardly until the reduced end 26 thereof engages the inclined arms 1f) ot the, cam levers and roA tates the can` levers against the action ot' the Springs thus iiiovii'ig the sei-rations 1S out ol" engagement with the reduced ends ot' the terminal pieces, the parts occupying the pesitions shown in Fi Q. lWhen thc parts are in the positions showir in Fig. 1, it will be obvious that any outward movement or tension upon the terminal pieces 13 will cause the serrations 18 upon the cani levers to be pressed more tightly in engage-ment with the terminal pieces.

The backing pins 15 it Will bey noted are arranged in alignment with andV upon the opposite side ol' the terminal pieces to the cani levers lt and serveI to lorm a rigid support to prevent any transverse movement ol the terminal pieces a vay trom the clamping action of the cani levers.

All ot the pins as Well as the cam levers are preferably constructed ot hardened steel.

The springs 33 and 3G serve not onlyto urge the cam levers into engagement with the terminal pieces, but alsoact as conductors the current passng trom the terminal pieces through the cam levers, and springs 32S and 5G respectively to the metallic sleeve 2T and rod 28.

While l have shown my invention as embodied in a telephone jack plug, it is obvious that it is equally applicable to almost any type ot an electrical connection such as lamp sockets two part plugs, etc. As shown herein the cam releasing means con'iprses a sliding member having an end projecting outside ot the casing. Such construction may be modified however, it' desired, and other means having an end projecting outside the casing and operatively associated with the cams may be substituted to release the cams from engagement with the terminals.

Instead ot using the pins 15 as abutments to hold the terminals against lateral displacementl in one direction alnitmcnts ot other construction may be used instead it desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In an electrical connection, means to secure a pair of wire terminalsv thereto, comprising a pair ol cam levers pivoted inter'- niediate their ends, resilient means contacting with said cam levers at one sidiA otrtheir pivotal points, and adapted to normally urge said levers into engagement, with said terminals, and a cam relcaser adapted to simultaneously engage said cani levers upon the other side ot' their pivotal points and more said levers against vthe action ot' said resilient means and out of engagement with said lever.

2. ln an electrical connection, means to connect a Wire terminal to said connection comprising a pivoted earn adapted to engage said tern'iinal, and resilient means to normall)Y urge said cam into engagement with said terminal, said cam yconstructed and arranged to be moved by outward movement ot' said terminal into tighter engagement therewith, and means comprising a slidable camreleaser to engage and move said cam out ot engagement with said terminal piece against the action ot said resilient means.

3. ln an electrical connection, an insulating block provided with recesses to receive a Wire terminal therein, a cam p'votally lltl lll

lili

mounted on said block, resilient means to ably mounted in said block and adapted to he moved into engagement with said cam and torce it out of engagement with said terminal, said block and cam releaser provided With cooperating means to limit the travel of releaser.

A5. In an electrical connection, an insulating block provided with recesses to receive a wire terminal therein, a cam pivotally mounted on said block, resilient means to normally urge said cam into engagement with 'said terminal, Aand a. cam releaser slidably mounted in said block and adapted to he moved into engagement With said cam and force it out of engagement With said terminal, said block and cam releaser provided with cooperating means to limit, the travel oli' said releaser and said cam releaser `projecting outwardly heyond said block and provided With means to anchor the connectm ing `wires thereto.

f6. 'in an electrical connection, an insulating block provided With recesses to receive Wire terminal therein, a cam pivotally mounted on said block, resilient means to normally urge said cam into engagement Willi said terminal, a. backing pin adapted to engage said terminal and oppose the thrust o l' said cam, and a cam releaser slid'- ahly mounted in said hlocl and adapted to he moved into engagement with said cam and force it out oi engagement With 'said teri'ninal.

"l, ln an electrical connection, an insulatslidahly mounted in said block adapted to be moved into simultaneous engagement with both of said cams and move them out of engagement with said terminals against the action of said resilient means.

8l In an electrical connection an insulat-l ing block provided With a pair of recesses to receive a pair of wire terminals therein, a pair oi cam levers pivotally mounted to said block intermediate their ends, contacting with said cam levers at one side of their pivotal points, resilient means to normally urge said cams into engagement with said terminals, backing pins to engage said terminals opposite to said cam levers, and a cam releascr slidahlymounted in said block adapted to simultaneously engage said cam levers upon. the opposite side ol'their pivotal points and move said levers against the action of said resilient means out of engagement with said terminal pieces. i

9. In an electrical connection, an insulating block provided .with recesses to receive Wire terminals and with abutments adjacent sides of said recesses to hold said terminals against lateral displacement in one direction, cams pivotally mounted in said block and provided With gripping edges arranged adjacent the opposite sides of said recesses, means-to normally urge saidcams into engagement with said terminals, means Within said block for electrically insulating said terminals one from the othennnd means projecting from said block and operatively associated with said cams to release said cams from engagement with said terminals.

10. In an electrical connection, an insulating block including two substantially similar sections provided with recesses to receive Wire terminals, cams pivotally mounted in said block and provided with gripping edges each capable of engagement with one of said terminals, means associated with each of said cams 4for normally pressing. the gripping edge thereof into engagement with one of said terminals, means within said block for electrically insulating said terminals one from the other and means projecting from said block and operatively associated With said cams to release said cams from engagementwith said terminals.

Signed at New York. in the county of New York and State ot New York, this 3rd day of June A. D. 1922.

EDV/'ARD BERGMAN. 

